code: def test_root_not_available(client):
      """Tests that plots/regret is not available"""
      response = client.simulate_get("/plots/regret")
  
      assert response.status == "404 Not Found"
  
file_path: orion/tests/functional/serving/test_plots_resource.py
imports: import pytest
  from orion.testing import falcon_client
label_desc: Use image node_id 1 for calling a global function with example usage: test_root_not_available(client) without return types